OGLE-TR-10 b
Astrophysical Synthesis & Habitability Characterization
OGLE-TR-10 b is a confirmed gas giant exoplanet orbiting the star OGLE-TR-10, located approximately 4386.7 light-years (1344.97 parsecs) from the Solar System. First announced in 2004 by OGLE using the Transit detection technique (producing an estimated primary transit depth of 1.2053% across the stellar disk), this world measures 14.011 Earth radii (1.25 Jupiter radii) and has a measured mass of 197.046 Earth masses (0.62 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.4 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1 g⊕ (9.81 m/s²), and an escape velocity of 41.9 km/s.
In its orbital architecture around OGLE-TR-10, OGLE-TR-10 b completes one full revolution every 3.101 Earth days at a semi-major axis of 0.0434 AU (an ultra-close orbit less than one-seventh of Mercury's 0.387 AU distance from the Sun, where strong stellar tidal forces typically induce synchronous rotation). Its mean orbital velocity is approximately 152.2 km/s (compared to Earth's 29.8 km/s). The orbit is modeled as circular (e = 0.00), maintaining a constant stellar distance throughout its year.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1702 K (+1429°C / +2604°F) and receiving 818.50 S⊕ (~1,113,983 W/m²), OGLE-TR-10 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star OGLE-TR-10 is classified as a solar-type yellow star of spectral type G2 V with an effective photospheric temperature of 5,950 K, a radius of 1.17 R☉, a mass of 1.14 M☉, an estimated bolometric luminosity of 1.539 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.1 Gyr and a metallicity of [Fe/H] = 0.28 dex (metal-rich relative to the Sun). From Earth, OGLE-TR-10 shines at apparent V-band magnitude 16.006 (faint and requiring research-grade or CCD telescopic photometry) in the Southern celestial hemisphere.
Methodology: Computed using the Schulze-Makuch et al. (2011) weighted metric comparing physical interior (radius, estimated density) and surface thermal regime (escape velocity, equilibrium temperature).
Discovery Facility: OGLE · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | OGLE-TR-10 |
| Spectral Type | G2 V |
| Effective Temp (Teff) | 5,950 K |
| Stellar Radius | 1.1700 R☉ |
| Stellar Mass | 1.1400 M☉ |
| Bolometric Luminosity | 1.539 L☉ |
| Metallicity [Fe/H] | 0.280 dex |
| Stellar Age | 3.100 Gyr |
| Apparent Magnitude | V: 16.006 · G: 15.685 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.043400 AU |
| Orbital Period | 3.101 days |
| Mean Orbital Velocity | 152.2 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 90.0000° |
| Mean Bulk Density | 0.4 g/cm³ (41.9 km/s vesc) |
| Insolation Flux | 818.5035 S⊕ (~1,113,983 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 4386.700 LY (1344.970 pc) |